Your daily look at late-breaking news, upcoming events and the stories that will be talked about today:
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1. SEARCH FOR ANSWERS AFTER BOSTON MARATHON BOMBINGS
No one claimed responsibility for the two explosions that killed three and wounded more than 140, but the president vowed to "find out who did this."
2. WORLD'S CITIES ON EDGE
Cities from Los Angeles to London see a surge in security and police were monitoring landmarks, government buildings and sporting events.
3. ANOTHER MARATHON ENDS, 'THEN I HEARD THE FIRST BLAST'
AP Sports Writer Jimmy Golen, covering his 18th Boston Marathon, says he saw a bloody, chaotic scene shortly after the explosions rocked the finish line.
4. A MERIT VISA IN NEW IMMIGRATION BILL
The visa in the plan being presented to the Senate this week would aim to bring talented workers to the U.S.
5. A DEMAND FROM NORTH KOREA
Pyongyang issued an ultimatum for an apology from South Korea for "hostile acts" and threatened unspecified retaliatory action.
6. OBAMA SCOURS SENATE FOR GUN CONTROL SUPPORT
Republican opposition is growing to a proposal to expand background checks for firearms buyers.
7. ATTACKS IN IRAQ BEAR HALLMARKS OF AL-QAIDA
A series of deadly car bombs appears aimed at sowing fear days before the first elections since U.S. troops withdrew.
8. WHAT WAS FOUND ON ASSAULTED TEEN
Audrie Pott's family attorney says her attackers wrote and drew on intimate parts of her body.
9. WHY WALL STREET WAS SPOOKED
The stock market had its worst day of the year, trigged by fears of an economic slowdown in China.
10. A SECOND COMING-OUT FOR BASKETBALL GREAT'S SON
Earvin Johnson III, Magic Johnson's 20-year-old son, said he revealed to his supportive family years ago that he was gay.